AMMONIUM SULFATE CAS N°: 7783-20-2

OECD SIDS
AMMONIUM SULFATE
4. ECOTOXICITY ID: 7783-20-2
DATE: 18.04.2006
The 48 hour LC50 was 113,15 mg ammonium sulfate N L-1
(converted from 15.5 mg NH4+/l); 5% confidence limit 13.75 -
16.0 mg NH4+/l. The LC50 values, computed from the mortality
rates, show that 50% of the organisms died within 49.8 hours
at 15.0 mg NH4+/l, and that 50% died after 30 h at 75 mg
NH4+/l.
Test condition: TEST ORGANISMS: The green mussel Perna viridis was
collectedfrom an unpolluted region at Someswara rocky shore
(12047'N;74051'E). All individuals were obtained during low
tide from the sub-tidal belt. They were transported to the
laboratory and kept unfed in large polythene trays, in
aerated sea water for 24 hours before the beginning of the
experiments. Young mussels in the size range 20 to 24 mm
were used, and only members of the same population were
examined in a single set of experiments.
TEST VESSELS: Cylindrical glass troughs of 5 L capacity
containing 4 l of sea water were used.
TEST METHODOLOGY: Ten individuals were exposed to each
concentration of NH4+, at 0, 5, 10, 15, 20, 50, and 75 mg
/L. Mortality tests were conducted over 96 hours. Death was
defined as the inability to close the valves upon mechanical
stimulus, and as valve gaping of 5mm. Dead individuals were
removed from the media at 12 hour intervals.
PHYSICAL/CHEMICAL PARAMETERS: The pH of the sea water varied
between 8.0 and 8.3, and the temperature of the sea water
varied between 28°C and 30°C during the experiments. In the
presence of ammonium, the pH varied from pH 8.125 at 5 mg/L
NH4+ to pH 7.85 at 75 mg/L NH4+.
Reliability: (2) valid with restrictions
Concentrations not measured. Limited documentation of
results, and of the ammonium sulfate used in the experiment.
Flag:
Critical study for SIDS endpoint
23-AUG-2005 (73)
Type:
flow through
Species:
Daphnia magna (Crustacea)
Exposure period: 120 hour(s)
Unit: mg/l Analytical monitoring: no data
EC50: = 272
EC100: = 500
EC5 : = 110
Method:
GLP:
Test substance:
other: see Test Condition
no data
other TS: ammonium sulfate, analytical grade
Test condition: Acute toxicity tests were performed with various materials
used as fertilizer in Czechoslovakia.
The tests were performed at pH 7.5 to 7.8 at 19-22 degree C
with Daphnia magna Strauss. No detail is provided as to the
experimental procedure (no. of test organisms, exposure
etc.).
Test concentration: 100, 10, 1 and 0.1 mg/l
Reliability: (4) not assignable
Abstract, original reference in foreign language
26-JAN-2004 (68)
Type:
Species:
104
static
Daphnia pulicaria (Crustacea)
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